719726 ÷ 91 
The aim is to understand the frequency of 91 in 719726.

Step 1:
The number 91 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 91

Step 2:
The number 91 fits into 71 0 times, leaving a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 91

Going ahead to step 3:
The number 91 fits into 719 7 times, leaving a remainder of 82.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 637 from 719 to get 82.
Include the next digit (7) from the dividend after 82, then repeat: 827 / 91

On to step 4:
91 can be fit into 827 9 times, resulting in a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 79.0
The remainder is 8 after subtracting 819 from 827.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 91

Let's proceed to step 5:
91 goes into 82 0 times with a remainder of 82.
Record the quotient 0 as the next digit in the result. 
Result so far: 790.0
Deduct 0 from 82 and we're left with 82.
Take the next digit (6) from the dividend and append it to 82, then repeat: 826 / 91

Moving on to step 6:
If we divide 826 by 91, we get 9 and a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 7909.0
The remainder is 7 after subtracting 819 from 826.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
91 can be fit into 70 0 times, resulting in a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 7909.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
700 divided by 91 is 7 with a remainder of 63.
Write down 7 as next digit of the result. 
Result so far: 7909.07
The remainder is 63 after subtracting 637 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 9:
91 goes into 630 6 times with a remainder of 84.
Write down 6 as next digit of the result. 
Result so far: 7909.076
The remainder is 84 after subtracting 546 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 10:
When dividing 840 by 91, we get 9 with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 7909.0769
The remainder is 21 after subtracting 819 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 11:
If we divide 210 by 91, we get 2 and a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 7909.07692
If we subtract 182 from 210, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
When dividing 280 by 91, we get 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 7909.076923
Subtract 273 from 280 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 13:
If we divide 70 by 91, we get 0 and a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 7909.076923
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 14:
700 divided by 91 is 7 with a remainder of 63.
Record the quotient 7 as the next digit in the result. 
Result so far: 7909.07692307
Deduct 637 from 700 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final result is 7909.07692307 with a remainder of 6.3e-08.